Your small intestine does most of the digesting of the foods you eat. If you have a malabsorption syndrome, your small intestine cannot absorb nutrients from foods. Causes of malabsorption syndromes include. 1  Celiac disease. 2  Lactose intolerance.  Short bowel syndrome. This happens after surgery to remove half or more of the small intestine. You might need the surgery if you have a problem with the small intestine from a disease, injury, or birth defect.
The exhaust manifold obviously carries exhaust away from the engine compartment. When the manifold fails to completely perform that function, fumes can enter the coach. This was not detected however in my coach so that telltale signal was missing. The manifold if leaking can reportedly injure the engine. And exhaust gases are used by the turbo system. If that is not performed well, you will notice a loss of boost (power) and mpg. If left unattended (repaired) the leak can also leak hot gasses into equipment and areas where it does not belong.
Exhaust leak symptoms will vary by where the leak is located. Also, the problems they can cause will vary by where the leak is located. A leak at the manifold between the manifold and the head will normally sound like a loud ticking sound. This kind of leak can create excess heat in the exhaust port, which can burn the exhaust valve-which will be an expensive repair. A leak somewhere between the exhaust flange and the muffler will normally sound like a throaty rumble. This type of leak is normally fairly easy and inexpensive to repair.